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Contrast coated stent and method of fabrication

a technology of contrast coating and stent, which is applied in the field of contrast coating stent, can solve the problems of significant re-narrowing of treated vessels, damage to the coating, and damage to the coating

Inactive Publication Date: 2006-01-19
MEDTRONIC VASCULAR INC
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Problems solved by technology

Soon after the procedure, however, a significant proportion of treated vessels re-narrow.
Damage to the coating may occur, however, during the handling and deployment of drug-coated stents.
Damage to the coating may also occur while the stent is advancing through the patients vascular system on the way to the treatment site.
Still other damage to the coating may occur when the stent is expanded by the balloon.
Damage to the drug coat during each of these situations may result in delivery of a less-than-effective dose of the drug at the treatment site.
Visualizing the stent during the advancement of the stent through the patient's vascular system also poses problems for the doctor performing the procedure.
Stents are often composed of material that is not easily visualized by the doctor as it travels through the body while other stents are so small they are hard to visualize.

Method used

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  • Contrast coated stent and method of fabrication
  • Contrast coated stent and method of fabrication
  • Contrast coated stent and method of fabrication

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Embodiment Construction

[0019]FIG. 1 illustrates a system for treating a vascular condition, comprising a contrast-drug polymer coated stent coupled to a catheter, in accordance with one embodiment of the present invention at 100. Vascular condition treatment system 100 includes a contrast-drug polymer coated stent 120 coupled to a delivery catheter 110. Coated stent 120 includes a stent framework 130, a drug-polymer coating 140 disposed on at least a portion of stent framework 130 and a contrast coat disposed on drug-polymer coating 140.

[0020] The stent 120 is conventional to stents generally and can be made of a wide variety of medical implantable materials, such as stainless steel (particularly 316-L or 316LS stainless steel), MP35 alloy, nitinol, tantalum, ceramic, nickel, titanium, aluminum, polymeric materials, tantalum, MP35N, titanium ASTM F63-83 Grade 1, niobium, high carat gold K 19-22, and combinations thereof. The stent 120 can be formed through various methods as well. The stent 120 can be we...

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Abstract

The invention provides a system for treating a vascular condition. The system includes a catheter and a stent disposed on the catheter. The system further includes a stent with at least an outer portion of the stent framework coated with a drug polymer solution and a contrast medium substantially covering at least an outer surface of the drug coating disposed on the outer surface of the stent framework. A method of manufacturing the contrast coated stent and a method of using the contrast coated stent is included.

Description

TECHNICAL FIELD [0001] The technical field of this disclosure is medical implant devices, particularly, a contrast coated stent and methods of making and using the same. BACKGROUND OF THE INVENTION [0002] Stents are generally cylindrical shaped devices that are radially expandable to hold open a segment of a blood vessel or other anatomical lumen after implantation into the body lumen. Stents have been developed with coatings to deliver drugs or other therapeutic agents. [0003] Stents are used in conjunction with balloon catheters in a variety of medical therapeutic applications including intravascular angioplasty. For example, a balloon catheter device is inflated during PTCA (percutaneous transluminal coronary angioplasty) to dilate a stenotic blood vessel. The stenosis may be the result of a lesion such as a plaque or thrombus. After inflation, the pressurized balloon exerts a compressive force on the lesion thereby increasing the inner diameter of the affected vessel. The increa...

Claims

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Application Information

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IPC IPC(8): A61F2/84A61F2/90
CPCA61F2/95A61F2/958A61L31/18A61F2250/0067A61F2/966
Inventor JONES, RYAN A.KANTOR, JOHN D,SHANAHAN, JOHN
Owner MEDTRONIC VASCULAR INC
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